I'm trying to take into account the Earth geopotential effect on the orbit.
- Are the terms (J2, etc.) change with time?
- Is it worth to take into account
- In JGM-3 N=M=70 (about 5000 coefficients). I found till degree 8 here. Where to find others?
I'm solving a differential equation with
J2. How to add other terms?
The shown equation gives 1 km error in comparison with GMAT, where degree 2 and order 0 is chosen for JGM-3 model. Probably, it takes into account